Riverside, MO 64150 Frost Dates
64150, near Riverside, MO: the frost window
Around 04/04 is the usual last spring frost, about 219 days away. Fall's first freeze usually shows up around 11/02, roughly 211 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Riverside in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Riverside's growing season runs out in roughly 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/04 isn't a guarantee
04/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/20 and only about 1 year in 10 sees frost after that.
Riverside against the rest of the dataset
Riverside's growing season runs about 211 days, ranking 14,756 of 40,283 US ZIP codes measured here, longest to shortest. Within MO, it ranks 165 of 1,129.
Learn more
Two guides worth reading on 64150: local microclimates, on what one yard in Riverside can differ from the 64150 normal, and zone vs. frost date, on why Zone 6b and Riverside's frost date answer different questions.